Hugo borchaedt



No. 613,058. Patented Oct. 25, |898. H. BURCHARDT.

AUTOMATIC LIGHTING DEVICE FOB GAS BURNERS.

(Application led Max'. 18, 1898.)

(No Model.)

I y1/Mza@ ZM 4 Mw i UNITED STATES PATENT OEEIcE.

HUGO BORCHARDT, OF BERLIN, GERMANY.

AUTOMATIC LIGHTING DEVICE FOR GAS-BURNERS.

SPECIFICATION forming part of Letters Patent No. 613,058, dated October 25, 1898.

Application led March 1 S, 1 8 9 8.

To all whom, it may concern:

Be it known that I, HUGO BORCHARDT, inechanical engineer, a citizen of the United States of America, residing at Berlin, in the Kingdom of Prussia and Empire of Germany, have invented certain new and useful Improvements in Automatic Gas-Lighting Devices; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

Automatic gas-lighting devices in which the opening and closing of the gas-valve is effected by means of an expansion-wire heated from a jet-dame possess the disadvantage of the wire becoming carbonized after a time Y through being in direct contact with the burning gas, and perhaps also in other ways becomes damaged and therefore requires frequent regulation as to tension. In order to obviate this defect, I provide an arrangement whereby the expansion-wire is inclosed in an insulating-carrier of porcelain, biscuit, clay, or other suitable material, and is thereby protected from the injurious action of the burn` ing gas.

The accompanying drawing is a vertical section of parts representing my invention applied to an automatic gas-lighting device of the character shown and described in my specification of Letters Patent No. 594,376, dated November 30, 1897.

Referring to the drawing, a represents the expansion-wire, inclosed in a porcelain carrier b and secured at the upper end thereof. This carrier b is fixed in a sleeve c', carried by a sleeve c, supported on the end of a screwthreaded pin d, which by screwing through the bracket e enables said sleeve c to be raised and lowered in order to regulate the tension of the expansion-wire a. The bracket e also carries the lighting-burner, which is lighted, asis well known, by means of a platinum sponge 7c, secured to a carrier i. The

. expansion-wire a is connected at its lower end to a spring-controlled rod g, located in the tube f, and this rod g actuates the gas-valve in the manner described in the specification hereinbefore referred to.

When at rest, the cold platinum wire a is SerialNo. 674,833. (No model.)

contracted and holds the rod g in its raised position, thereby holding theV main gas-valve closed and cutting off the supply of gas from the main gas-burner. When a supply of gas is admitted to the tube through an auxiliary valve, (not shown,) it passes out of the igniting-burner h and is ignited automatically by the platinum sponge k. The heat/of this lighting-flame is communicated to the wire ct through the shield or casing b without the wire being touched by the flame. When the wire a becomes hot, it expands and lowers the rod g, which permits the main gas-valve to open and supply the main gas-burner with gas, which is ignited by the aforesaid lighting-dame.

The parts hereinbefore described and not shown in the drawing are of any approved construction.

l. In a gas-lighting device, the combination, with a platinum Wire for normallyholding the main valve of a main gas-burner in its closed position; of a lighting-burner arranged in proximity to the said wire, means for automatically igniting the gas which issues from the lighting-burner, and a non-metallic shield interposed between the lighting-burner and the said wire, whereby said wire is heated by the lighting-llame without being exposed to contact with-it, substantially as set forth.

2. Inagas-lightingdevice,the combination,

with a platinum wire for normally holding the main valve of a main gas-burner in its closed position, and a tubular non-metallic shield which both supports and guards the said wire; of a lighting-burner arranged in proximity to the said shield, and means for automatically igniting the gas which issues from the lighting-burner, the flame from the said lightingburner operating to heat the said wire through the said shield without coming in contact with the said wire, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

HUGO BoRcHARDr.

Witnesses:

HENRY HAsPER, CHAs. H. DAY. 

